https://www.btstories.com/birth-of-isaac/
When Abram was ninety-nine years old, the Lord said to him, “You’ll be the father of many nations and some of your descendants will be kings! Therefore I’m changing your name to Abraham, which means the ‘father of many nations’. I will be with you and I will give this land to you and your descendants. As a sign of these promises, you are to circumcise every male among you.”
Then the Lord said to him, “From now on, your wife will be called Sarah. I will bless her, and she’ll bear you a son.”
